Convection in a dusty radio-frequency plasma under the influence of a thermal gradient

Details Convection in a dusty radio-frequency plasma under the influence of a thermal gradient Convection in a dusty radio-frequency plasma under the influence of a thermal gradient

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13h3034s&link_type=abstract

New Journal of Physics, Volume 13, Issue 8, pp. 083034 (2011).

Physics

Scientific paper

Gas convection is a common phenomenon in systems under atmospheric pressure conditions with a temperature gradient. Under low pressure conditions, convection can be induced by creep flows along a surface. This has important applications in fluid physics as well as in low pressure plasmas in which a temperature gradient is present. Here, we visualize the gas dynamics in a system with and without a plasma using microparticles as tracers. Two types of gas convection have been identified from the particle motion, i.e. free (Rayleigh-Bénard) convection at high gas pressures, and convection induced by thermal creep at low pressures. The gas flow profile detected using the microparticles is compared with that obtained in a simulation using the direct simulation Monte Carlo method.

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